1858 – 33 citizens acquire the property of the former medieval Augustinian monastery inter lacus to build a spa, a whey centre and a society house. The buyers lease the property to the French Baron Azène du Plessis.
1859 – The grand opening of the newly built Kursaal with rooms for reading, games, restaurants, music and balls is taking place on July 20. Just one month later, the ban on ‘games of chance’ is issued and the Kurhaus is closed again.
1862 – The corporation ‘Kurhausgesellschaft Interlaken’ is established by the buyers of Aarzelgmatte.
1873 – A music pavilion is erected in the centre axis of the Kursaalgarden. In 1892, it is moved to the left-hand so that the Jungfrau is visible from the main building.